CN101354124A - Keyboard illumination module of electronic device - Google Patents
Keyboard illumination module of electronic device Download PDFInfo
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- CN101354124A CN101354124A CNA2007100293996A CN200710029399A CN101354124A CN 101354124 A CN101354124 A CN 101354124A CN A2007100293996 A CNA2007100293996 A CN A2007100293996A CN 200710029399 A CN200710029399 A CN 200710029399A CN 101354124 A CN101354124 A CN 101354124A
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- electronic installation
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- brightness
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Abstract
The invention discloses a keyboard lighting module of an electronic device, which can adjust the illuminating brightness of the keyboard of the electronic device and comprises a control unit used for receiving a brightness adjustment instruction and generating and outputting a pulse width modulation (PWM) signal according to the brightness adjustment instruction, a voltage control unit used for receiving the pulse width modulation (PWM) signal and controlling the voltage value of an outputted driving signal according to the duty cycle of the pulse width modulation (PWM) signal, and a projection lamp unit used for receiving the driving signal and generating a lighting source matched with the voltage value so as to be projected on the keyboard of the electronic device.
Description
Technical field
The present invention is about the keyboard illumination module of a kind of lighting module, particularly a kind of electronic installation.
Background technology
In today of computer prosperity, carrying computer has become modern's demand, in order to deal with this trend, so computermaker dwindles portable computer (portable computer) again, become the much the same notebook computer of area and notebook, its function and desktop computer are similar, but can put into leather trunk or the handbag of carrying, and have satisfied business people's demand of available computer everywhere.
Because notebook computer is light, so also often in meeting, when seminar or motion report, be used to use the displaying data, normally utilize the mode of projection will show that data projection is to giant-screen, yet for the people who uses notebook computer, may be still operating computer, but because insufficient light on every side, therefore when operation keyboard, often have can not find will by button or the situation that pushes the wrong button take place, very not convenient, so there is a kind of electronic installation of tool keyboard illumination function to provide auxiliary lighting apparatus to solve foregoing problems at present, it includes: a housing, one leaded light component and a luminescence component, wherein, housing has a keyboard rest area, and a keyboard places the keyboard rest area, and an opening is positioned at least one side of keyboard rest area; Leaded light component is arranged in the housing and adjacent openings, and at least one part of leaded light component emitted light is incident upon at least one side of keyboard by opening; Luminescence component is arranged at least one side of leaded light component.
In addition, there is a kind of portable computer to provide auxiliary lighting apparatus to solve foregoing problems with servicing lighting, this servicing lighting when normal operating position towards the irradiation of the keyboard of this portable computer, with the clear sign of seeing each key when night or the operation of dark place with and relative position.The portable computer that wherein has a servicing lighting comprises that mainly one traditional has with liquid crystal or the alternate manner portable computer as the covering panel of display; And a servicing lighting with at least one light-emitting device as tungsten lamp, be arranged on the position of above-mentioned covering panel top, and the irradiating angle of this light-emitting device can adjust towards single direction at least, so that this irradiating angle is remained on towards the direction of this portable computer keyboard.
Though above-mentioned design can solve the problem that need throw light on when using keyboard, yet have at external environment under the situation of different brightness conditions, when still adopting same brightness of illumination to shine keyboard, and can't obtain preferable illuminating effect, therefore, how a kind of keyboard illumination module of brightness-adjusting is provided, becomes one of researcher's problem to be solved.
Summary of the invention
In view of above problem, the invention provides a kind of keyboard illumination module of electronic installation, utilize pulse wave width modulation signal combination voltage control circuit cheaply, with the brightness of illumination of adjustment keyboard illumination module output light source, and then obtain preferable illuminating effect.
The keyboard illumination module of disclosed electronic installation according to the present invention includes: control module receives brightness adjustment instruction, and according to brightness adjustment instruction, produces a pulse wave width modulation (PWM) signal and output; Voltage control unit with the control module electric property coupling, receives pulse wave width modulation (PWM) signal, and controls the magnitude of voltage of the driving signal of output according to the work period (duty cycle) of pulse wave width modulation (PWM) signal; And the projecting lamp unit, with the voltage control unit electric property coupling, receive the lighting source that drives signal and produce the corresponding voltage value, on the keyboard that is projected to electronic installation.
In addition, the keyboard illumination module of disclosed electronic installation according to the present invention includes: control module receives a brightness and adjusts data, and data are adjusted in brightness is converted to an analog driving signal and output; And the projecting lamp unit, with the control module electric property coupling, receive analog driving signal and produce the lighting source of corresponding analog driving signal, on this keyboard that is projected to this electronic installation.
Keyboard illumination module by this electronic installation, utilize control module in the electronic installation to have the characteristic of pulse width modulation function or digital-to-analog translation function, selectivity cooperates voltage control unit cheaply again, make keyboard illumination module except the basic function that possesses the open and close of keyboard illumination module in the past, more increase brightness and adjusted function, so, have when external environment under the situation of different brightness conditions, can be by adjusting the brightness of irradiation keyboard, obtain preferable illuminating effect, and then promote the operational quality of electronic installation.
Relevant characteristics and implementation of the present invention cooperate diagram to be described in detail as follows as most preferred embodiment now.
Description of drawings
Figure 1A is the system block diagrams of first embodiment of the invention.
Figure 1B is the system block diagrams of second embodiment of the invention.
Fig. 2 is the circuit diagram of first embodiment of the invention.
The specific embodiment
Please refer to Figure 1A, be the system block diagrams of first embodiment of the invention.As shown in the figure, the keyboard illumination module of electronic installation of the present invention includes control module 10, voltage control unit 20 and projecting lamp unit 30.
In addition, control module 10 more can combine with light sensing circuit, adjust the table of comparisons by the ambient brightness of setting up sensing brightness value and output signal value relation in advance, and then make control module 10 adjust table of comparisons output pulse wave width modulation signal to voltage control unit 20 according to ambient brightness, with the Control of Voltage operation of being correlated with, so, can make electronic installation adjust keyboard illumination brightness automatically according to external environment brightness.
Perhaps, when the work period of pulse wave width modulation (PWM) signal (duty cycle) promotes 10 times of the work period (duty cycle) become original pulse wave width modulation (PWM) signal, then the magnitude of voltage of the driving signal of voltage control unit 20 output is then reduced to 10 times of original output voltage, in other words, the work period (duty cycle) of pulse wave width modulation (PWM) signal becomes the relation of a direct ratio with the magnitude of voltage of the driving signal of output.Wherein voltage control unit 20 can for example be the integrating circuit that is made of resistance, electric capacity and operational amplifier.
Please refer to Figure 1B, be the system block diagrams of second embodiment of the invention.As shown in the figure, the keyboard illumination module of electronic installation of the present invention includes control module 10 and projecting lamp unit 30.
In addition, control module 10 more can combine with light sensing circuit, adjust the table of comparisons by the ambient brightness of setting up sensing brightness value and output signal value relation in advance, and then make control module 10 export analog driving signal to voltage control unit 20 according to the ambient brightness adjustment table of comparisons, with the Control of Voltage operation of being correlated with, so, can make electronic installation adjust keyboard illumination brightness automatically according to external environment brightness.
Please refer to Fig. 2, be the circuit block diagram of first embodiment of the invention.As shown in the figure, the keyboard illumination module of electronic installation of the present invention includes control module 10 (not shown), voltage control unit 20 and projecting lamp unit 30.Circuit connecting relation below is described:
First end of resistance R is electrically coupled to control module 10, and reception pulse wave width modulation (PWM) signal, and second end of resistance R is electrically coupled to first end of capacitor C and the non-inverting input of operational amplifier OP, second end of capacitor C and the inverting input of operational amplifier OP are electrically coupled to earth terminal, the output of operational amplifier OP is electrically coupled to projecting lamp unit 30, and wherein resistance R, capacitor C and operational amplifier OP constitute integrating circuit.
The circuit operation principle below is described:
When pulse wave width modulation (PWM) signal with one first work period (duty cycle) when value inputs to voltage control unit 20, because the characteristic of integrating circuit, this moment, voltage control unit 20 outputs had the driving signal of first magnitude of voltage to projecting lamp unit 30, so that projecting lamp unit 30 produces the lighting source of first brightness, when pulse wave width modulation (PWM) signal changes into by first work period (duty cycle) value that second work period (duty cycle) is worth and when inputing to voltage control unit 20, because the characteristic of integrating circuit, voltage control unit 20 output this moment by the driving signal that originally has first magnitude of voltage change into have second magnitude of voltage the driving signal to projecting lamp unit 30, so that projecting lamp unit 30 produces the lighting source of second brightness, so, see through work period (duty cycle) value that changes pulse wave width modulation (PWM) signal, can adjust projecting lamp unit 30 brightness of illuminations.
Comprehensive the above, the keyboard illumination module of electronic installation of the present invention utilizes the control module in the electronic installation to have the characteristic of pulse width modulation function or digital-to-analog translation function, selectivity cooperates voltage control unit cheaply again, make keyboard illumination module except the basic function that possesses the open and close of keyboard illumination module in the past, more increase brightness and adjusted function, so, have when external environment under the situation of different brightness conditions, can be by adjusting the brightness of irradiation keyboard, obtain preferable illuminating effect, and then promote the operational quality of electronic installation.
Though the present invention discloses as above with aforesaid preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of alike skill person; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, therefore scope of patent protection of the present invention must be looked the appended claim person of defining of this specification and is as the criterion.
Claims (8)
1, a kind of keyboard illumination module of electronic installation can be adjusted the brightness of illumination of keyboard of this electronic installation of irradiation, it is characterized in that this keyboard illumination module includes:
One control module receives brightness adjustment instruction, and according to this brightness adjustment instruction, produces a pulse wave width modulation (PWM) signal and output;
One voltage control unit with this control module electric property coupling, receives this pulse wave width modulation (PWM) signal, and controls the magnitude of voltage of the driving signal of output according to the work period (duty cycle) of this pulse wave width modulation (PWM) signal; And
One projecting lamp unit with this voltage control unit electric property coupling, receives this driving signal and produces to lighting source that should magnitude of voltage, on this keyboard that is projected to this electronic installation.
2, the keyboard illumination module of electronic installation according to claim 1 is characterized in that: the integrating circuit that described voltage control unit is made of a resistance, an electric capacity and an operational amplifier.
3, the keyboard illumination module of electronic installation according to claim 2, it is characterized in that: first end of described resistance is electrically coupled to this control module, second end of this resistance is electrically coupled to first end of this electric capacity and the non-inverting input of this operational amplifier, second end of this electric capacity and the inverting input of this operational amplifier are electrically coupled to earth terminal, and the output of this operational amplifier is electrically coupled to this projecting lamp unit.
4, the keyboard illumination module of electronic installation according to claim 1 is characterized in that: described control module is an embedded controller (EC) or KBC (KBC).
5, the keyboard illumination module of electronic installation according to claim 1 is characterized in that: described control module is a pulse wave width modulation (PWM) integrated circuit.
6, a kind of keyboard illumination module of electronic installation can be adjusted the brightness of illumination of keyboard of this electronic installation of irradiation, it is characterized in that this keyboard illumination module includes:
One control module receives a brightness and adjusts data, and these brightness adjustment data are converted to an analog driving signal and output; And
One projecting lamp unit with this control module electric property coupling, receives this analog driving signal and produces to lighting source that should analog driving signal, on this keyboard that is projected to this electronic installation.
7, the keyboard illumination module of electronic installation according to claim 6 is characterized in that: described control module is an embedded controller (EC) or KBC (KBC).
8, the keyboard illumination module of electronic installation according to claim 6 is characterized in that: described control module is a digital/analog converter (DAC) integrated circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100293996A CN101354124A (en) | 2007-07-27 | 2007-07-27 | Keyboard illumination module of electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100293996A CN101354124A (en) | 2007-07-27 | 2007-07-27 | Keyboard illumination module of electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101354124A true CN101354124A (en) | 2009-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100293996A Pending CN101354124A (en) | 2007-07-27 | 2007-07-27 | Keyboard illumination module of electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101354124A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101840269B (en) * | 2009-03-18 | 2013-05-15 | 新巨企业股份有限公司 | Control method of keyboard generating color change |
| CN107631210A (en) * | 2017-09-23 | 2018-01-26 | 南京律智诚专利技术开发有限公司 | A kind of Multi-functional Lighting system on keyboard |
| CN108391351A (en) * | 2018-03-02 | 2018-08-10 | 联想(北京)有限公司 | A kind of brightness adjusting method of keyboard light, device and electronic equipment |
-
2007
- 2007-07-27 CN CNA2007100293996A patent/CN101354124A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101840269B (en) * | 2009-03-18 | 2013-05-15 | 新巨企业股份有限公司 | Control method of keyboard generating color change |
| CN107631210A (en) * | 2017-09-23 | 2018-01-26 | 南京律智诚专利技术开发有限公司 | A kind of Multi-functional Lighting system on keyboard |
| CN108391351A (en) * | 2018-03-02 | 2018-08-10 | 联想(北京)有限公司 | A kind of brightness adjusting method of keyboard light, device and electronic equipment |
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Application publication date: 20090128 |